GATE ECE 1989 | GATE ECE Year Wise Previous Years Questions

GATE ECE 1989

Subjective

+10

-0

Design a rectangilar hollow metal waveguide to operate in the X-band such that at an operating free-space wavelength of 3.2 cm
(a) The guide-wavelength for the $$T{E_{{{10}^ - }}}$$ mode is 40% more than the operating free-space wavelength.
(b) The cut-off wavelength for the $$T{M_{{{11}^ - }}}$$ mode is 40% of the cut-off wavelength for the $$T{E_{{{10}^ - }}}$$ mode.

GATE ECE 1989

MCQ (Single Correct Answer)

-0.3

In a microprocessor system, the stack is used for

storing the program return address whenever a sub-routine jump instruction is executed.

transmitting and receiving input-output data.

storing all important CPU register contents whenever an interrupt is to be serviced.

storing program instructions for interrupt service routines.

GATE ECE 1989

MCQ (Single Correct Answer)

-0.6

In the circuit of figure, the power dissipated in the register R is 1W when only source '1' is present and '2' replaced by a short.The power dissipated in the same registor R is 4W when only source '2' is present and '1' is replaced by a short.When both the source '1' and '2' are present, the power dissipated in R will be:

GATE ECE 1989 Network Theory - Network Theorems Question 29 English

1 W

3 W

4 W

5 W

GATE ECE 1989

MCQ (Single Correct Answer)

-0.6

A load, Z_L = R_L + jX_L is to be matched, using an ideal transformer, to a generator of internal impedance, Z_S = R_S + jX_S .The turns ratio of the transformer required is

$$\sqrt{\left|Z_\mathrm L\;/\;Z_\mathrm S\right|}$$

$$\sqrt{\left|R_\mathrm L\;/\;R_\mathrm S\right|}$$

$$\sqrt{\left|R_\mathrm L\;/\;Z_\mathrm S\right|}$$

$$\sqrt{\left|{\mathrm Z}_\mathrm L\;/\;R_\mathrm S\right|}$$

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